drm/xe/xe2: Add performance turning changes

Update performance tuning according to the hardware spec.

Bspec: 72161
Signed-off-by: Shekhar Chauhan <shekhar.chauhan@intel.com>
Reviewed-by: Sai Teja Pottumuttu <sai.teja.pottumuttu@intel.com>
Reviewed-by: Akshata Jahagirdar <akshata.jahagirdar@intel.com>
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240805053710.877119-1-shekhar.chauhan@intel.com

drivers/gpu/drm/xe/regs/xe_gt_regs.h

@@ -80,6 +80,9 @@
 #define   LE_CACHEABILITY_MASK			REG_GENMASK(1, 0)
 #define   LE_CACHEABILITY(value)		REG_FIELD_PREP(LE_CACHEABILITY_MASK, value)
 
+#define STATELESS_COMPRESSION_CTRL		XE_REG(0x4148)
+#define   UNIFIED_COMPRESSION_FORMAT		REG_GENMASK(3, 0)
+
 #define XE2_GAMREQSTRM_CTRL			XE_REG(0x4194)
 #define   CG_DIS_CNTLBUS			REG_BIT(6)
 
@@ -193,6 +196,7 @@
 #define GSCPSMI_BASE				XE_REG(0x880c)
 
 #define CCCHKNREG1				XE_REG_MCR(0x8828)
+#define   L3CMPCTRL				REG_BIT(23)
 #define   ENCOMPPERFFIX				REG_BIT(18)
 
 /* Fuse readout registers for GT */

drivers/gpu/drm/xe/xe_tuning.c

@@ -39,7 +39,8 @@ static const struct xe_rtp_entry_sr gt_tunings[] = {
 	},
 	{ XE_RTP_NAME("Tuning: Compression Overfetch"),
 	  XE_RTP_RULES(GRAPHICS_VERSION_RANGE(2001, XE_RTP_END_VERSION_UNDEFINED)),
-	  XE_RTP_ACTIONS(CLR(CCCHKNREG1, ENCOMPPERFFIX)),
+	  XE_RTP_ACTIONS(CLR(CCCHKNREG1, ENCOMPPERFFIX),
+			 SET(CCCHKNREG1, L3CMPCTRL))
 	},
 	{ XE_RTP_NAME("Tuning: Enable compressible partial write overfetch in L3"),
 	  XE_RTP_RULES(GRAPHICS_VERSION_RANGE(2001, XE_RTP_END_VERSION_UNDEFINED)),
@@ -50,6 +51,11 @@ static const struct xe_rtp_entry_sr gt_tunings[] = {
 	  XE_RTP_ACTIONS(SET(L3SQCREG2,
 			     COMPMEMRD256BOVRFETCHEN))
 	},
+	{ XE_RTP_NAME("Tuning: Stateless compression control"),
+	  XE_RTP_RULES(GRAPHICS_VERSION_RANGE(2001, XE_RTP_END_VERSION_UNDEFINED)),
+	  XE_RTP_ACTIONS(FIELD_SET(STATELESS_COMPRESSION_CTRL, UNIFIED_COMPRESSION_FORMAT,
+				   REG_FIELD_PREP(UNIFIED_COMPRESSION_FORMAT, 0)))
+	},
 	{}
 };